The story takes place in the pre-liberation southwestern borderlands, where two well-dressed young men are welcomed on a winding path in the deep mountains. They are Qi Yuanjing and Zhou Luo, spies sent by the police department, disguised as merchants to find out the reality of a group of cunning bandits. As twilight approaches, the two men make their way to the secluded Purple Cloud Taoist Temple. The Taoist master, Shou Jing, shows the two of them in, but the meticulous Qi Yuanjing discovers a...